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configure.ac
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configure.ac
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# Copyright (C) Internet Systems Consortium, Inc. ("ISC")
#
# SPDX-License-Identifier: MPL-2.0
#
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, you can obtain one at https://mozilla.org/MPL/2.0/.
#
# See the COPYRIGHT file distributed with this work for additional
# information regarding copyright ownership.
#
# Defining the version in m4 requires a bit of dancing around,
# so the strings are properly concatenated, as you can't use
# a shell variable in AC_INIT
#
m4_define([bind_VERSION_MAJOR], 9)dnl
m4_define([bind_VERSION_MINOR], 21)dnl
m4_define([bind_VERSION_PATCH], 3)dnl
m4_define([bind_VERSION_EXTRA], -dev)dnl
m4_define([bind_DESCRIPTION], [(Development Release)])dnl
m4_define([bind_SRCID], [m4_esyscmd_s([git rev-parse --short HEAD | cut -b1-7])])dnl
m4_define([bind_PKG_VERSION], [[bind_VERSION_MAJOR.bind_VERSION_MINOR.bind_VERSION_PATCH]bind_VERSION_EXTRA])dnl
#
# Autoconf initialization
#
AC_INIT([BIND], bind_PKG_VERSION, [https://gitlab.isc.org/isc-projects/bind9/-/issues/new?issuable_template=Bug], [], [https://www.isc.org/downloads/])
AC_PREREQ([2.69])
AC_DEFINE([PACKAGE_VERSION_MAJOR], ["][bind_VERSION_MAJOR]["], [BIND 9 Major part of the version])
AC_DEFINE([PACKAGE_VERSION_MINOR], ["][bind_VERSION_MINOR]["], [BIND 9 Minor part of the version])
AC_DEFINE([PACKAGE_VERSION_PATCH], ["][bind_VERSION_PATCH]["], [BIND 9 Patch part of the version])
AC_DEFINE([PACKAGE_VERSION_EXTRA], ["][bind_VERSION_EXTRA]["], [BIND 9 Extra part of the version])
AC_DEFINE([PACKAGE_DESCRIPTION], [m4_ifnblank(bind_DESCRIPTION, [" ]bind_DESCRIPTION["], [])], [An extra string to print after PACKAGE_STRING])
AC_DEFINE([PACKAGE_SRCID], ["][bind_SRCID]["], [A short hash from git])
bind_CONFIGARGS="${ac_configure_args:-default}"
AC_DEFINE_UNQUOTED([PACKAGE_CONFIGARGS], ["$bind_CONFIGARGS"], [Either 'defaults' or used ./configure options])
AC_DEFINE([PACKAGE_BUILDER], ["make"], [make or Visual Studio])
#
# Get the Canonical System Type
#
AC_CANONICAL_BUILD
AC_CANONICAL_HOST
AC_CANONICAL_TARGET
AC_CONFIG_SRCDIR([bin/named/main.c])
AM_INIT_AUTOMAKE([1.14 tar-pax foreign subdir-objects dist-xz no-dist-gzip -Wall -Werror])
AM_SILENT_RULES([yes])
AM_EXTRA_RECURSIVE_TARGETS([test unit doc])
AC_CONFIG_HEADERS([config.h])
AC_CONFIG_MACRO_DIR([m4])
#
# Enable maintainer mode by default only when building from git repository
# and not cross compling
#
AS_IF([test "$cross_compiling" = no],
[AM_MAINTAINER_MODE(m4_ifset([bind_SRCID],[enable],[disable]))],
[AM_MAINTAINER_MODE([disable])])
#
# Enable system extensions to C and POSIX
#
AC_USE_SYSTEM_EXTENSIONS
#
# Compiler compatibility flags
#
m4_version_prereq([2.70],
[AC_PROG_CC],
[AC_PROG_CC_C99])
AC_PROG_CPP_WERROR
#
# Find build compiler when cross compiling
#
AX_PROG_CC_FOR_BUILD
#
# Find the machine's endian flavor.
#
AC_C_BIGENDIAN
#
# Enable large file support
#
AC_SYS_LARGEFILE
AC_FUNC_FSEEKO
# Enable RFC 3542 APIs on macOS
AC_DEFINE([__APPLE_USE_RFC_3542], [1], [Select RFC3542 IPv6 API on macOS])
AC_PROG_MAKE_SET
# Checks for programs.
m4_ifdef([AM_PROG_AR], [AM_PROG_AR]) # call AM_PROG_AR only if available
AC_PROG_INSTALL
AC_PROG_LN_S
AX_POSIX_SHELL
AC_PROG_MKDIR_P
# Initialize libtool
LT_INIT([disable-static dlopen pic-only])
AS_IF([test "$enable_static" != "no" && test "$enable_developer" != "yes"],
[AC_MSG_ERROR([Static linking is not supported as it disables dlopen() and certain security features (e.g. RELRO, ASLR)])])
#
# Set the default CFLAGS, CPPFLAGS, and LDFLAGS
#
STD_CFLAGS="-Wall -Wextra -Wwrite-strings -Wpointer-arith -Wno-missing-field-initializers -Wformat -Wshadow"
# These should be always errors
STD_CFLAGS="$STD_CFLAGS -Werror=implicit-function-declaration -Werror=missing-prototypes -Werror=format-security -Werror=parentheses -Werror=implicit -Werror=strict-prototypes -Werror=vla"
# Disable false positives generated by GCC 11+ and ASAN
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([[]],
[[#if __GNUC__ >= 11 && defined(__SANITIZE_ADDRESS__)
#error Address Sanitizer enabled
#endif
]])],
[],
[STD_CFLAGS="$STD_CFLAGS -Wno-stringop-overread"])
# Silence GCC 11.1+ note about the changed alignment, see GL #4841
AS_CASE([$target_cpu],[i?86],[STD_CFLAGS="$STD_CFLAGS -Wno-psabi"])
STD_LDFLAGS=""
# ... except in test code
TEST_CFLAGS="-Wno-vla"
# Fortify the sources by default (we undefine the macro first in case
# the compiler has a different built-in setting)
STD_CPPFLAGS="-U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2"
#
# Additional compiler settings.
#
AX_CHECK_COMPILE_FLAG([-fno-strict-aliasing],
[STD_CFLAGS="$STD_CFLAGS -fno-strict-aliasing"])
# Clang only issues a warning so use -Werror to force a error.
AX_CHECK_COMPILE_FLAG([-Werror -fno-delete-null-pointer-checks],
[STD_CFLAGS="$STD_CFLAGS -fno-delete-null-pointer-checks"])
AX_CHECK_COMPILE_FLAG([-fdiagnostics-show-option],
[STD_CFLAGS="$STD_CFLAGS -fdiagnostics-show-option"])
AX_CHECK_LINK_FLAG([-Wl,--export-dynamic],
[STD_LDFLAGS="$STD_LDFLAGS -Wl,--export-dynamic"])
host_macos=no
AS_CASE([$host],[*-darwin*],[host_macos=yes])
AM_CONDITIONAL([HOST_MACOS], [test "$host_macos" = "yes"])
#
# Change defaults for developers if not explicity set.
# Needs to be before the option is tested.
#
# [pairwise: --enable-developer, --disable-developer]
AC_ARG_ENABLE([developer],
[AS_HELP_STRING([--enable-developer],
[enable developer build settings])])
AS_IF([test "$enable_developer" = "yes"],
[DEVELOPER_MODE=yes
STD_CPPFLAGS="$STD_CPPFLAGS -DISC_MEM_DEFAULTFILL=1 -DISC_MEM_TRACKLINES=1 -DISC_LIST_CHECKINIT=1 -DISC_STATS_CHECKUNDERFLOW=1 -DDNS_RBTDB_STRONG_RWLOCK_CHECK=1 -DISC_MUTEX_ERROR_CHECK=1"
test "${enable_fixed_rrset+set}" = set || enable_fixed_rrset=yes
test "${enable_querytrace+set}" = set || enable_querytrace=yes
test "${with_cmocka+set}" = set || with_cmocka=yes
test "${with_zlib+set}" = set || with_zlib=yes
test "${enable_warn_error+set}" = set || enable_warn_error=yes
])
AC_SUBST([DEVELOPER_MODE])
AC_SUBST([STD_CFLAGS])
AC_SUBST([STD_CPPFLAGS])
AC_SUBST([STD_LDFLAGS])
AC_SUBST([TEST_CFLAGS])
# [pairwise: --enable-warn-error, --disable-warn-error]
AC_ARG_ENABLE([warn_error],
[AS_HELP_STRING([--enable-warn-error],
[turn on -Werror when compiling])],
[],[enable_warn_error=no])
AS_IF([test "$enable_warn_error" = "yes"],
[STD_CFLAGS="$STD_CFLAGS -Werror"])
#
# Use pkg-config
#
PKG_PROG_PKG_CONFIG
AS_IF([test -z "$PKG_CONFIG"],
[AC_MSG_ERROR([The pkg-config script could not be found or is too old.])])
#
# Pick Userspace-RCU flavor (developer only option)
#
# [pairwise: skip]
AC_ARG_WITH([liburcu],
[AS_HELP_STRING([--with-liburcu=FLAVOR],
[Build with Userspace-RCU variant (developer-only option) (membarrier|qsbr|mb|bp) [default=membarrier]]))],
[], [with_liburcu=membarrier])
AC_MSG_CHECKING([liburcu flavor])
AS_CASE([$with_liburcu],
[membarrier],
[RCU_FLAVOR="liburcu"
AC_DEFINE([RCU_MEMBARRIER], [1], [Build with membarrier Userspace-RCU flavor])],
[qsbr],
[RCU_FLAVOR="liburcu-qsbr"
AC_DEFINE([RCU_QSBR], [1], [Build with QSBR Userspace-RCU flavor])],
[mb],
[RCU_FLAVOR="liburcu-mb"
AC_DEFINE([RCU_MB], [1], [Build with mb Userspace-RCU flavor])],
[bp],
[RCU_FLAVOR="liburcu-bp"
AC_DEFINE([RCU_BP], [1], [Build with bulletproof Userspace-RCU flavor])],
[AC_MSG_ERROR([Invalid Userspace-RCU flavor picked])])
AS_IF([test "$with_liburcu" != "membarrier" && test "$enable_developer" != "yes"],
[AC_MSG_ERROR([Changing Userspace-RCU variant is allowed only in developer mode])])
AC_MSG_RESULT([$RCU_FLAVOR])
#
# liburcu << v0.13.0 didn't add -lurcu-common and some toolchains would
# not add it automatically - we need to add it explicitly in such case.
#
PKG_CHECK_MODULES([LIBURCU], [$RCU_FLAVOR >= 0.13.0 liburcu-cds >= 0.13.0], [],
[PKG_CHECK_MODULES([LIBURCU], [$RCU_FLAVOR >= 0.10.0 liburcu-cds >= 0.10.0],
[LIBURCU_LIBS="$LIBURCU_LIBS -lurcu-common"])])
AC_DEFINE_UNQUOTED([RCU_FLAVOR], ["$RCU_FLAVOR"], [Chosen Userspace-RCU flavor])
PKG_CHECK_VERSION([RCU_VERSION], [$RCU_FLAVOR])
AC_DEFINE_UNQUOTED([RCU_VERSION], ["$RCU_VERSION"], [Compile-time Userspace-RCU version])
CFLAGS="$CFLAGS $LIBURCU_CFLAGS"
LIBS="$LIBS $LIBURCU_LIBS"
#
# Userspace-RCU inlining doesn't work for rcu_deference() with some combination
# of C compiler and library version.
#
AC_MSG_CHECKING([whether we can inline small liburcu functions])
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([[#define URCU_INLINE_SMALL_FUNCTIONS 1
#include <urcu.h>]],
[[struct opaque *a; struct opaque *b = rcu_dereference(a);]])],
[AC_MSG_RESULT([yes])
AC_DEFINE([URCU_INLINE_SMALL_FUNCTIONS], [1], [Inline small (less than 10 lines) functions])],
[AC_MSG_RESULT([no])])
# Fuzzing is not included in pairwise testing as fuzzing tools are
# not present in the relevant Docker image.
#
# [pairwise: skip]
AC_ARG_ENABLE([fuzzing],
[AS_HELP_STRING([--enable-fuzzing=<afl|libfuzzer|ossfuzz>],
[Enable fuzzing using American Fuzzy Lop or libFuzzer (default=no)])],
[],
[enable_fuzzing=no])
AC_MSG_CHECKING([whether to enable fuzzing mode])
AS_CASE([$enable_fuzzing],
[no],[AC_MSG_RESULT([no])],
[afl],[
AC_MSG_RESULT([using AFL])
AC_DEFINE([ENABLE_AFL], [1],
[Define to enable American Fuzzy Lop test harness])
STD_CFLAGS="$STD_CFLAGS -DFUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION=1"
FUZZ_LOG_COMPILER="afl.sh"],
[libfuzzer],[
AC_MSG_RESULT([using libFuzzer])
STD_CFLAGS="$STD_CFLAGS -DFUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION=1 -fsanitize=fuzzer-no-link,address,undefined"
LDFLAGS="$LDFLAGS -fsanitize=address,undefined"
FUZZ_LDFLAGS="-fsanitize=fuzzer,address,undefined"
FUZZ_LOG_COMPILER="libfuzzer.sh"],
[ossfuzz],[
AC_MSG_RESULT([using OSS-Fuzz])
FUZZ_LDFLAGS="$LIB_FUZZING_ENGINE"],
[*],[AC_MSG_ERROR([You need to explicitly select the fuzzer])])
AM_CONDITIONAL([HAVE_FUZZ_LOG_COMPILER], [test -n "$FUZZ_LOG_COMPILER"])
AC_SUBST([FUZZ_LOG_COMPILER])
AC_SUBST([FUZZ_LDFLAGS])
AS_IF([test "$enable_fuzzing" = "afl"],
[AC_MSG_CHECKING("for AFL enabled compiler")
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],
[#ifndef __AFL_COMPILER
#error AFL compiler required
#endif
])],
[AC_MSG_RESULT([yes])],
[AC_MSG_ERROR([set CC=afl-<gcc|clang> when --enable-fuzzing=afl is used])])
])
#
# Perl is optional; it is used only by some of the system test scripts.
#
AC_PATH_PROGS([PERL], [perl5 perl])
AC_SUBST([PERL])
AM_CONDITIONAL([HAVE_PERL], [test -n "$PERL"])
#
# Python is optional, it is used only by some of the system test scripts.
#
AM_PATH_PYTHON([3.6], [], [:])
AM_CONDITIONAL([HAVE_PYTHON], [test "$PYTHON" != ":"])
AC_PATH_PROGS([PYTEST], [pytest-3 py.test-3 pytest py.test pytest-pypy], [])
AS_IF([test -z "$PYTEST"],
[AC_MSG_WARN([pytest not found, some system tests will be skipped])])
AC_SUBST([PYTEST])
AM_CONDITIONAL([HAVE_PYTEST], [test -n "$PYTEST"])
#
# xsltproc is optional, it is used only by system test scripts.
#
AC_PATH_PROG([XSLTPROC], [xsltproc])
#
# Using Solaris linker with gcc on Solaris breaks Thread Local Storage
#
AS_CASE([$host],
[*-solaris*],[
AS_IF([test "$GCC" = "yes"],
[LDFLAGS="$LDFLAGS -zrelax=transtls"
AC_MSG_WARN([When using GNU C Compiler on Solaris, -zrelax=transtls linker flag is used to fix bug in Thread Local Storage])
])
])
AC_CHECK_HEADERS([fcntl.h regex.h sys/time.h unistd.h sys/mman.h sys/sockio.h sys/select.h sys/sysctl.h net/if6.h net/route.h linux/netlink.h linux/rtnetlink.h], [], [],
[$ac_includes_default
#include <sys/param.h>
#include <sys/socket.h>
])
#
# Check for C11 thread local storage
#
# NOTE: OpenBSD doesn't ship <threads.h>, so we can't require it (yet).
#
AC_CHECK_HEADERS([threads.h])
#
# C11 Atomic Operations
#
AC_CHECK_HEADERS([stdatomic.h],
[],
[AC_MSG_ERROR([C11 Atomic Operations required, update your toolchain to build BIND 9])])
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[[#include <stdatomic.h>]],
[[atomic_int_fast32_t val = 0; atomic_fetch_add_explicit(&val, 1, memory_order_relaxed);]]
)],
[AC_MSG_CHECKING([whether -latomic is needed for 64-bit stdatomic.h functions])
AC_LINK_IFELSE(
[AC_LANG_PROGRAM(
[[#include <stdatomic.h>]],
[[atomic_int_fast64_t val = 0; atomic_fetch_add_explicit(&val, 1, memory_order_relaxed);]]
)],
[AC_MSG_RESULT([no])],
[LIBS="$LIBS -latomic"
AC_LINK_IFELSE(
[AC_LANG_PROGRAM(
[[#include <stdatomic.h>]],
[[atomic_int_fast64_t val = 0; atomic_fetch_add_explicit(&val, 1, memory_order_relaxed);]]
)],
[AC_MSG_RESULT([yes])],
[AC_MSG_FAILURE([libatomic needed, but linking with -latomic failed, please fix your toolchain.])])
])
],
[AC_MSG_FAILURE([stdatomic.h header found, but compilation failed, please fix your toolchain.])])
AC_C_CONST
AC_C_INLINE
AC_C_VOLATILE
#
# Check for yield support on ARM processors
#
AS_CASE([$host],
[arm*|aarch64*],
[AC_MSG_CHECKING([for ARM yield instruction support])
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([[]],
[[__asm__ __volatile__ ("yield")]])],
[AC_MSG_RESULT([yes])
AC_DEFINE([HAVE_ARM_YIELD], [1],
[define if the ARM yield instruction is available])],
[AC_MSG_RESULT([no])])])
#
# Check for pause support on SPARC processors
#
AS_CASE([$host],
[sparc*],
[AC_MSG_CHECKING([for pause instruction support])
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([[]],
[[__asm__ __volatile__ ("pause")]])],
[AC_MSG_RESULT([yes])
AC_DEFINE([HAVE_SPARC_PAUSE], [1],
[define if the SPARC pause instruction is available])],
[AC_MSG_RESULT([no])])])
AC_CHECK_FUNCS([sysctlbyname])
AC_TYPE_SIZE_T
AC_TYPE_SSIZE_T
AC_TYPE_UINTPTR_T
#
# check for uname library routine
#
AC_MSG_CHECKING([for uname])
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[[#include <sys/utsname.h>
#include <stdio.h>
]],
[[
struct utsname uts;
uname(&uts);
printf("running on %s %s %s for %s\n",
uts.sysname, uts.release, uts.version, uts.machine);
]])],
[AC_MSG_RESULT(yes)
AC_DEFINE([HAVE_UNAME], [1], [define if uname is available])
],
[AC_MSG_RESULT(no)
AC_MSG_WARN([uname is not correctly supported])
])
#
# check for GCC malloc attribute
#
AX_GCC_FUNC_ATTRIBUTE([malloc])
AC_MSG_CHECKING([for extended malloc attributes])
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[[
#include <stddef.h>
#include <stdlib.h>
__attribute__ ((malloc, malloc (free, 1))
void * xmalloc(size_t sz) { return malloc(sz); }
]],
[[
void *p = xmalloc(8);
free(p);
]])],
[AC_MSG_RESULT(yes)
AC_DEFINE([HAVE_MALLOC_EXT_ATTR], [1], [define if extended attributes for malloc are available])
],
[AC_MSG_RESULT(no)])
#
# check for GCC returns_nonnull attribute
#
AX_GCC_FUNC_ATTRIBUTE([returns_nonnull])
#
# how to link math functions?
#
AC_SEARCH_LIBS([sqrt],[m])
#
# GeoIP support?
#
# Should be on by default if libmaxminddb exists.
#
# [pairwise: --enable-geoip --with-maxminddb=auto, --enable-geoip --with-maxminddb=yes, --disable-geoip]
AC_ARG_ENABLE([geoip],
[AS_HELP_STRING([--disable-geoip],
[support GeoIP2 geolocation ACLs if available [default=yes]])],
[], [enable_geoip="yes"])
# [pairwise: skip]
AC_ARG_WITH([maxminddb],
[AS_HELP_STRING([--with-maxminddb=PATH],
[Build with MaxMind GeoIP2 support (auto|yes|no|path) [default=auto]])],
[], [with_maxminddb="auto"])
AS_IF([test "$enable_geoip" = "yes"],
[AS_CASE([$with_maxminddb],
[no],[AC_MSG_ERROR([Use '--disable-geoip' to disable the GeoIP])],
[auto],[PKG_CHECK_MODULES([MAXMINDDB], [libmaxminddb],
[AC_DEFINE([HAVE_GEOIP2], [1], [Build with GeoIP2 support])
PKG_CHECK_VAR([MAXMINDDB_PREFIX], [libmaxminddb], [prefix], [], [AC_MSG_ERROR([libmaxminddb prefix not found in pkg-config; set MAXMINDDB_PREFIX in the environment])])
],[:])],
[yes],[PKG_CHECK_MODULES([MAXMINDDB], [libmaxminddb],
[AC_DEFINE([HAVE_GEOIP2], [1], [Build with GeoIP2 support])
PKG_CHECK_VAR([MAXMINDDB_PREFIX], [libmaxminddb], [prefix], [], [AC_MSG_ERROR([libmaxminddb prefix not found in pkg-config; set MAXMINDDB_PREFIX in the environment])])
])],
[ # default
AX_SAVE_FLAGS([maxminddb])
MAXMINDDB_CFLAGS="-I$with_maxminddb/include"
MAXMINDDB_LIBS="-L$with_maxminddb/lib"
CFLAGS="$CFLAGS $MAXMINDDB_CFLAGS"
LIBS="$LIBS $MAXMINDDB_LIBS"
AC_SEARCH_LIBS([MMDB_open], [maxminddb],
[AC_DEFINE([HAVE_GEOIP2], [1], [Build with GeoIP2 support])
MAXMINDDB_LIBS="$MAXMINDDB_LIBS $ac_cv_search_MMDB_open"
AC_MSG_NOTICE([GeoIP2 default database path set to $with_maxminddb/share/GeoIP])
AS_VAR_COPY([MAXMINDDB_PREFIX], [with_maxminddb])
],
[AC_MSG_ERROR([GeoIP2 requested, but libmaxminddb not found])])
AX_RESTORE_FLAGS([maxminddb])
])
AC_ARG_VAR([MAXMINDDB_PREFIX], [value of prefix for MAXMINDDB, overriding pkg-config])
])
AM_CONDITIONAL([HAVE_GEOIP2], [test -n "$MAXMINDDB_LIBS"])
AC_SUBST([MAXMINDDB_CFLAGS])
AC_SUBST([MAXMINDDB_LIBS])
AX_PTHREAD
LIBS="$PTHREAD_LIBS $LIBS"
CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
CC="$PTHREAD_CC"
AC_MSG_CHECKING([for PTHREAD_MUTEX_ADAPTIVE_NP])
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([[#include <pthread.h>]],
[[(void)pthread_mutexattr_settype(&(pthread_mutexattr_t){ NULL }, PTHREAD_MUTEX_ADAPTIVE_NP);]])],
[AC_MSG_RESULT([yes])
AC_DEFINE([HAVE_PTHREAD_MUTEX_ADAPTIVE_NP], [1], [Define to 1 if PTHREAD_MUTEX_ADAPTIVE_NP is available])],
[AC_MSG_RESULT([no])])
AC_CHECK_FUNCS([pthread_attr_getstacksize pthread_attr_setstacksize pthread_barrier_init pthread_spin_init])
AC_SEARCH_LIBS([sched_yield],[rt])
AC_CHECK_FUNCS([sched_yield pthread_yield pthread_yield_np])
# Look for functions relating to thread naming
AC_CHECK_FUNCS([pthread_setname_np pthread_set_name_np])
AC_CHECK_HEADERS([pthread_np.h], [], [], [#include <pthread.h>])
# libuv
PKG_CHECK_MODULES([LIBUV], [libuv >= 1.37.0], [],
[PKG_CHECK_MODULES([LIBUV], [libuv >= 1.34.0 libuv < 1.35.0], [],
[AC_MSG_ERROR([libuv >= 1.34.0 (except 1.35.0 and 1.36.0) not found])])])
PKG_CHECK_VERSION([LIBUV_VERSION], [libuv])
AX_SAVE_FLAGS([libuv])
CFLAGS="$CFLAGS $LIBUV_CFLAGS"
LIBS="$LIBS $LIBUV_LIBS"
# libuv recvmmsg support
AC_CHECK_DECLS([UV_UDP_MMSG_FREE, UV_UDP_MMSG_CHUNK], [], [], [[#include <uv.h>]])
AC_MSG_CHECKING([whether struct msghdr uses padding for alignment])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <sys/socket.h>],
[const struct msghdr h = { .__pad1 = 0, .__pad2 = 0 };])],
[AC_MSG_RESULT([yes])
AC_DEFINE([HAVE_DECL_UV_UDP_RECVMMSG],
[0], [Disable recvmmsg support on systems with MUSL glibc])],
[AC_MSG_RESULT([no])
AC_CHECK_DECLS([UV_UDP_RECVMMSG], [], [], [[#include <uv.h>]])])
# libuv recverr support
AC_CHECK_DECLS([UV_UDP_LINUX_RECVERR], [], [], [[#include <uv.h>]])
AX_RESTORE_FLAGS([libuv])
# [pairwise: --enable-doh --with-libnghttp2=auto, --enable-doh --with-libnghttp2=yes, --disable-doh]
AC_ARG_ENABLE([doh],
[AS_HELP_STRING([--disable-doh], [disable DNS over HTTPS, removes dependency on libnghttp2 (default is --enable-doh)])],
[], [enable_doh=yes])
# [pairwise: skip]
AC_ARG_WITH([libnghttp2],
[AS_HELP_STRING([--with-libnghttp2],
[build with libnghttp2 library [yes|no|auto] (default is auto)])],
[], [with_libnghttp2="auto"])
AS_IF([test "$enable_doh" = "yes"],
[AS_CASE([$with_libnghttp2],
[no],[AC_MSG_ERROR([Use '--disable-doh' to disable DNS-over-HTTPS support])],
[auto|yes],[PKG_CHECK_MODULES([LIBNGHTTP2], [libnghttp2 >= 1.6.0],
[AC_DEFINE([HAVE_LIBNGHTTP2], [1], [Build with DNS-over-HTTPS support])],
[AC_MSG_ERROR(m4_normalize([DNS-over-HTTPS support requested, but libnghttp2 not found.
Either install libnghttp2 or use --disable-doh.]))])],
[AC_MSG_ERROR([Specifying libnghttp2 installation path is not supported, adjust PKG_CONFIG_PATH instead])])])
AM_CONDITIONAL([HAVE_LIBNGHTTP2], [test -n "$LIBNGHTTP2_LIBS"])
#
# flockfile is usually provided by pthreads
#
AC_CHECK_FUNCS([flockfile getc_unlocked])
#
# Look for other ways to allow detection of the number of processors.
#
AC_CHECK_FUNCS([sched_getaffinity cpuset_getaffinity])
#
# Do we want to use pthread rwlock?
#
# [pairwise: --enable-pthread-rwlock, --disable-pthread-rwlock]
AC_ARG_ENABLE([pthread_rwlock],
[AS_HELP_STRING([--enable-pthread-rwlock],
[use pthread rwlock instead of internal rwlock implementation])],
[], [enable_pthread_rwlock=no])
AS_IF([test "$enable_pthread_rwlock" = "yes"],
[AC_CHECK_FUNCS([pthread_rwlock_rdlock], [],
[AC_MSG_ERROR([pthread_rwlock_rdlock requested but not found])])
AC_DEFINE([USE_PTHREAD_RWLOCK],[1],[Define if you want to use pthread rwlock implementation])
])
AM_CONDITIONAL([USE_ISC_RWLOCK], [test "$enable_pthread_rwlock" != "yes"])
CRYPTO=OpenSSL
#
# OpenSSL/LibreSSL is mandatory
#
PKG_CHECK_MODULES([OPENSSL], [libssl >= 1.1.1 libcrypto >= 1.1.1])
PKG_CHECK_VERSION([OPENSSL_VERSION], [openssl])
AX_SAVE_FLAGS([openssl])
CFLAGS="$OPENSSL_CFLAGS $CFLAGS"
LIBS="$OPENSSL_LIBS $LIBS"
#
# Check for functions added in OpenSSL or LibreSSL
#
AC_MSG_CHECKING([for Ed448 support])
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([[#include <openssl/evp.h>]],
[[EVP_PKEY_CTX *kctx = EVP_PKEY_CTX_new_id(NID_ED448, NULL);]])],
[AC_DEFINE([HAVE_OPENSSL_ED448], [1], [define if OpenSSL supports Ed448])
AC_MSG_RESULT([yes])],
[AC_MSG_RESULT([no])])
AC_CHECK_FUNCS([ERR_get_error_all])
AC_CHECK_FUNCS([BIO_read_ex BIO_write_ex])
AC_CHECK_FUNCS([EVP_MD_CTX_get0_md])
AC_CHECK_FUNCS([EVP_PKEY_eq])
AC_CHECK_FUNCS([SSL_CTX_set1_cert_store])
#
# Check whether FIPS mode is available and whether we should enable it
#
# FIPS is not included in pairwise testing as the relevant Docker image
# does not support FIPS mode.
#
AC_CHECK_FUNCS(EVP_default_properties_enable_fips FIPS_mode)
# [pairwise: skip]
AC_ARG_ENABLE([fips-mode],
[AS_HELP_STRING([--enable-fips-mode],
[enable FIPS mode in OpenSSL library [default=no]])],
[], [enable_fips_mode="no"])
AC_MSG_CHECKING([whether to enable FIPS mode in OpenSSL library])
AS_CASE([$enable_fips_mode],
[yes], [AC_MSG_RESULT([yes])
AC_DEFINE([ENABLE_FIPS_MODE], [1], [Define to 1 if you want FIPS mode to be enabled])
AS_IF([test "x$ac_cv_func_FIPS_mode" != xyes -a "x$ac_cv_func_EVP_default_properties_enable_fips" != xyes],
AC_MSG_FAILURE([OpenSSL FIPS mode requested but not available.]))],
[no], [AC_MSG_RESULT([no])])
AX_RESTORE_FLAGS([openssl])
AC_SUBST([OPENSSL_CFLAGS])
AC_SUBST([OPENSSL_LIBS])
AC_CHECK_FUNCS([clock_gettime])
# [pairwise: --with-gssapi=yes, --with-gssapi=auto, --without-gssapi]
AC_ARG_WITH([gssapi],
[AS_HELP_STRING([--with-gssapi=[PATH|[/path/]krb5-config]],
[Specify path for system-supplied GSSAPI
[default=auto]])],
[], [with_gssapi="auto"])
KRB5_CONFIG=
AS_CASE([$with_gssapi],
[no],[AC_MSG_CHECKING([for GSSAPI support])
AC_MSG_RESULT([no])],
[yes],[AC_PATH_PROG([KRB5_CONFIG], [krb5-config])
AS_IF([test -z "$KRB5_CONFIG"],
[AC_MSG_ERROR([krb5-config required but not found])])],
[auto],[AC_PATH_PROG([KRB5_CONFIG], [krb5-config])],
[*krb5-config*],[KRB5_CONFIG="$with_gssapi"],
[AC_MSG_ERROR([--with-gssapi requires yes|no|auto|/path/to/krb5-config])])
GSSAPI_CFLAGS=
GSSAPI_LIBS=
KRB5_CFLAGS=
KRB5_LIBS=
AS_IF([test -n "$KRB5_CONFIG"],
[AC_MSG_CHECKING([for gssapi libraries])
AX_SAVE_FLAGS([gssapi])
GSSAPI_CFLAGS=`"$KRB5_CONFIG" --cflags gssapi`
GSSAPI_LIBS=`"$KRB5_CONFIG" --libs gssapi`
CFLAGS="$CFLAGS $GSSAPI_CFLAGS"
LIBS="$LIBS $GSSAPI_LIBS"
AC_MSG_RESULT([$GSSAPI_CFLAGS $GSSAPI_LIBS])
AC_CHECK_HEADERS([gssapi/gssapi.h], [],
[AC_CHECK_HEADERS([gssapi.h], [],
[AC_MSG_ERROR([neither gssapi/gssapi.h nor gssapi.h found])])])
AC_CHECK_HEADERS([gssapi/gssapi_krb5.h],
[AC_CHECK_HEADERS([gssapi_krb5.h], []
[AC_MSG_ERROR([neither gssapi/gssapi_krb5.h nor gssapi_krb5.h found])])])
AC_CHECK_FUNCS([gss_acquire_cred],[],
[AC_MSG_ERROR([linking with $GSSAPI_LIBS does not work])])
AX_RESTORE_FLAGS([gssapi])
AC_MSG_CHECKING([for krb5 libraries])
AX_SAVE_FLAGS([krb5])
KRB5_CFLAGS=`"$KRB5_CONFIG" --cflags krb5`
KRB5_LIBS=`$KRB5_CONFIG --libs krb5`
CFLAGS="$CFLAGS $KRB5_CFLAGS"
LIBS="$CFLAGS $KRB5_LIBS"
AC_MSG_RESULT([$KRB5_CFLAGS $KRB5_LIBS])
AC_CHECK_HEADERS([krb5/krb5.h], [],
[AC_CHECK_HEADERS([krb5.h], [],
[AC_MSG_ERROR([neither krb5/krb5.h nor krb5 found])])])
AC_CHECK_FUNCS([krb5_init_context], [],
[AC_MSG_ERROR([linking with $KRB5_LIBS failed])])
AX_RESTORE_FLAGS([krb5])
AC_DEFINE([HAVE_GSSAPI], [1], [Define to 1 if you have the Kerberos Framework available])
# kludge to silence compiler warnings which recommend use of GSS.framework on macOS
AS_CASE([$host],[*-darwin*],[CFLAGS="$CFLAGS -Wno-deprecated-declarations"])])
AM_CONDITIONAL([HAVE_GSSAPI], [test -n "$GSSAPI_LIBS"])
AC_SUBST([GSSAPI_CFLAGS])
AC_SUBST([GSSAPI_LIBS])
AC_SUBST([KRB5_CFLAGS])
AC_SUBST([KRB5_LIBS])
#
# was --with-lmdb specified?
#
# [pairwise: --with-lmdb=auto, --with-lmdb=yes, --without-lmdb]
AC_ARG_WITH([lmdb],
[AS_HELP_STRING([--with-lmdb=@<:@PATH@:>@],
[use LMDB library @<:@default=auto@:>@, optionally specify the prefix for lmdb library])],
[:],
[with_lmdb="auto"])
ac_lib_lmdb_found=no
AS_CASE([$with_lmdb],
[no],[],
[auto|yes], [PKG_CHECK_MODULES([LMDB], [lmdb],
[ac_lib_lmdb_found=yes],
[for ac_lib_lmdb_path in /usr /usr/local /opt /opt/local; do
AX_LIB_LMDB([$ac_lib_lmdb_path],
[ac_lib_lmdb_found=yes
break])
done
])],
[AX_LIB_LMDB([$with_lmdb],[ac_lib_lmdb_found=yes])])
# don't fail when in automatic mode
AS_IF([test "$with_lmdb" = "auto" && test "$ac_lib_lmdb_found" = "no"],
[with_lmdb=no])
# hard fail when LMDB requested, but not found
AS_IF([test "$with_lmdb" != "no" && test "$ac_lib_lmdb_found" != "yes"],
[AC_MSG_ERROR([LMDB requested, but not found])])
AS_IF([test "$ac_lib_lmdb_found" = "yes"],
[AC_DEFINE([HAVE_LMDB], [1], [Use lmdb library])])
AC_SUBST([LMDB_CFLAGS])
AC_SUBST([LMDB_LIBS])
AM_CONDITIONAL([HAVE_LMDB], [test -n "$LMDB_LIBS"])
#
# was --with-libxml2 specified?
#
# [pairwise: --with-libxml2=auto, --with-libxml2=yes, --without-libxml2]
AC_ARG_WITH([libxml2],
[AS_HELP_STRING([--with-libxml2],
[build with libxml2 library [yes|no|auto] (default is auto)])],
[], [with_libxml2="auto"])
AS_CASE([$with_libxml2],
[no],[],
[auto],[PKG_CHECK_MODULES([LIBXML2], [libxml-2.0 >= 2.6.0],
[AC_DEFINE([HAVE_LIBXML2], [1], [Use libxml2 library])],
[:])],
[yes],[PKG_CHECK_MODULES([LIBXML2], [libxml-2.0 >= 2.6.0],
[AC_DEFINE([HAVE_LIBXML2], [1], [Use libxml2 library])])],
[AC_MSG_ERROR([Specifying libxml2 installation path is not supported, adjust PKG_CONFIG_PATH instead])])
AM_CONDITIONAL([HAVE_LIBXML2], [test -n "$LIBXML2_LIBS"])
#
# was --with-json-c specified?
#
# [pairwise: --with-json-c=detect, --with-json-c=yes, --without-json-c]
AC_ARG_WITH([json-c],
[AS_HELP_STRING([--with-json-c],
[build with json-c library [yes|no|detect] (default is detect)])],
[], [with_json_c="detect"])
AS_CASE([$with_json_c],
[no],[],
[detect],[PKG_CHECK_MODULES([JSON_C], [json-c >= 0.11],
[AC_DEFINE([HAVE_JSON_C], [1], [Use json-c library])],
[:])],
[yes],[PKG_CHECK_MODULES([JSON_C], [json-c >= 0.11],
[AC_DEFINE([HAVE_JSON_C], [1], [Use json-c library])])],
[AC_MSG_ERROR([Specifying json-c installation path is not supported, adjust PKG_CONFIG_PATH instead])]
)
AM_CONDITIONAL([HAVE_JSON_C], [test -n "$JSON_C_LIBS"])
AC_SUBST([JSON_C_CFLAGS])
AC_SUBST([JSON_C_LIBS])
#
# was --with-zlib specified?
#
# [pairwise: --with-zlib=auto, --with-zlib=yes, --without-zlib]
AC_ARG_WITH([zlib],
[AS_HELP_STRING([--with-zlib],
[build with zlib for HTTP compression
[default=yes]])],
[], with_zlib="auto")
AS_CASE([$with_zlib],
[no],[],
[auto],[PKG_CHECK_MODULES([ZLIB], [zlib],
[AC_DEFINE([HAVE_ZLIB], [1], [Use zlib library])],
[:])],
[yes],[PKG_CHECK_MODULES([ZLIB], [zlib],
[AC_DEFINE([HAVE_ZLIB], [1], [Use zlib library])])],
[AC_MSG_ERROR([Specifying zlib installation path is not supported, adjust PKG_CONFIG_PATH instead])])
AC_SUBST([ZLIB_CFLAGS])
AC_SUBST([ZLIB_LIBS])
#
# was --with-libsystemd specified?
#
# [pairwise: --with-libsystemd=auto, --with-libsystemd=yes, --without-libsystemd]
AC_ARG_WITH([libsystemd],
[AS_HELP_STRING([--with-libsystemd],
[build with libsystemd integration [default=auto]])],
[], [with_libsystemd=auto])
AS_CASE([$with_libsystemd],
[no],[],
[auto],[PKG_CHECK_MODULES([LIBSYSTEMD], [libsystemd],
[AC_DEFINE([HAVE_LIBSYSTEMD], [1], [Use libsystemd library])],
[:])],
[yes],[PKG_CHECK_MODULES([LIBSYSTEMD], [libsystemd],
[AC_DEFINE([HAVE_LIBSYSTEMD], [1], [Use libsystemd library])])],
[AC_MSG_ERROR([Specifying libsystemd installation path is not supported, adjust PKG_CONFIG_PATH instead])])
AC_SUBST([LIBSYSTEMD_CFLAGS])
AC_SUBST([LIBSYSTEMD_LIBS])
#
# Check if the system supports glibc-compatible backtrace() function.
#
AC_CHECK_HEADERS([execinfo.h],
[AC_SEARCH_LIBS([backtrace_symbols], [execinfo],
[AC_CHECK_FUNCS([backtrace_symbols])])])
#
# We do the IPv6 compilation checking after libtool so that we can put
# the right suffix on the files.
#
AC_MSG_CHECKING([for IPv6 structures])
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[[
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
]],
[[
struct sockaddr_in6 sin6;
struct in6_addr in6;
struct in6_pktinfo in6_pi;
struct sockaddr_storage storage;
in6 = in6addr_any;
in6 = in6addr_loopback;
sin6.sin6_scope_id = 0;
return (0);
]])],
[AC_MSG_RESULT([yes])],
[AC_MSG_FAILURE([IPv6 support is mandatory])])
#
# Allow forcibly disabling TCP Fast Open support as autodetection might yield
# confusing results on some systems (e.g. FreeBSD; see set_tcp_fastopen()
# comment in lib/isc/socket.c).
#
# [pairwise: --enable-tcp-fastopen, --disable-tcp-fastopen]
AC_ARG_ENABLE([tcp_fastopen],
[AS_HELP_STRING([--disable-tcp-fastopen],
[disable TCP Fast Open support [default=yes]])],
[], [enable_tcp_fastopen="yes"])
AS_IF([test "$enable_tcp_fastopen" = "yes"],
[AC_DEFINE([ENABLE_TCP_FASTOPEN], [1], [define if you want TCP_FASTOPEN enabled if available])])
#
# Check for some other useful functions that are not ever-present.
#
AC_CHECK_FUNCS([strlcpy strlcat strnstr])
#
# Check for readline support
#
# editline is not included in pairwise testing as the library
# is not present in the relevant Docker image.
#
# GNU Readline is not included in pairwise testing as the library
# in the relevant Docker image does not support pkg-config.
#
# [pairwise: --with-readline=auto, --with-readline=yes, --with-readline=libedit, --without-readline]
AC_ARG_WITH([readline],
[AS_HELP_STRING([--with-readline=yes|no|libedit|readline],
[specify readline library [default auto]])],
[], [with_readline="auto"])
AS_CASE([$with_readline],
[no],[],
[auto|yes],
[PKG_CHECK_MODULES([READLINE], [libedit],
[AC_DEFINE([HAVE_READLINE_LIBEDIT], [1], [Build with libedit support])],
[PKG_CHECK_MODULES([READLINE], [libeditline],
[AC_DEFINE([HAVE_READLINE_EDITLINE], [1], [Build with editline support.])],
[PKG_CHECK_MODULES([READLINE], [readline],
[AC_DEFINE([HAVE_READLINE_READLINE], [1], [Build with readline support.])],
[AS_IF([test "$with_readline" = "yes"],
[AC_MSG_ERROR([readline support requested, but none of the libraries have been found.])])])])])],
[libedit],
[PKG_CHECK_MODULES([READLINE], [libedit],
[AC_DEFINE([HAVE_READLINE_LIBEDIT], [1], [Build with libedit support])])],
[editline],
[PKG_CHECK_MODULES([READLINE], [libeditline],
[AC_DEFINE([HAVE_READLINE_EDITLINE], [1], [Build with editline support])])],
[readline],
[PKG_CHECK_MODULES([READLINE], [readline],
[AC_DEFINE([HAVE_READLINE_READLINE], [1], [Build with readline support])])],
[AC_MSG_ERROR([Unknown readline '$with_readline' library requested.])])
AM_CONDITIONAL([HAVE_READLINE], [test -n "$READLINE_LIBS"])
AC_SUBST([READLINE_CFLAGS])
AC_SUBST([READLINE_LIBS])
#
# Security Stuff
#
# Note it is very recommended to *not* disable chroot(),
# this is only because chroot() was made obsolete by Posix.
#
# [pairwise: --enable-chroot, --disable-chroot]
AC_ARG_ENABLE(chroot, AS_HELP_STRING([--disable-chroot], [disable chroot]))
case "$enable_chroot" in
yes|'')
AC_CHECK_FUNCS(chroot)
;;
no)
;;
esac
AS_CASE([$host],
[*-linux*],
[PKG_CHECK_MODULES([LIBCAP], [libcap],
[AC_DEFINE([HAVE_LIBCAP], [1], [Define to 1 if libcap was found])])])
case "$host" in
*-solaris*)
AC_DEFINE(NEED_SECURE_DIRECTORY, 1,
[Define if connect does not honour the permission on the UNIX domain socket.])
;;
esac
#
# Time Zone Stuff
#
AC_CHECK_FUNCS([tzset])